31013022231 has 16 divisors (see below), whose sum is σ = 46047564000. Its totient is φ = 20629292544.

The previous prime is 31013022223. The next prime is 31013022253. The reversal of 31013022231 is 13222031013.

31013022231 is a `hidden beast` number, since 310 + 1 + 302 + 22 + 31 = 666.

It is not a de Polignac number, because 31013022231 - 2³ = 31013022223 is a prime.

It is a super-2 number, since 2×31013022231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31013022221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1266976 + ... + 1291221.

It is an arithmetic number, because the mean of its divisors is an integer number (2877972750).

Almost surely, 2^31013022231 is an apocalyptic number.

31013022231 is a deficient number, since it is larger than the sum of its proper divisors (15034541769).

31013022231 is a wasteful number, since it uses less digits than its factorization.

31013022231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558655 (or 2558649 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31013022231 its reverse (13222031013), we get a palindrome (44235053244).

The spelling of 31013022231 in words is "thirty-one billion, thirteen million, twenty-two thousand, two hundred thirty-one".